Yan WU
,
Weihong ZHONG
,
Zhijie SUN
,
Abdolghane Torki
,
Zuoguang ZHANG
材料科学技术（英）
The aramid fiber/UHMWPE (ultrahigh molecular weight polyethylene) fiber hybrid composites (AF/DF) were ma-nufactured. By Charpy impact, the low velocity impact behavior of AF/DF composite was studied. And the high velocity impact behavior under ballistic impact was also investigated. The influence of hybrid ratio on the performances of low and high velocity impact was analyzed, and hybrid structures with good impact properties under low velocity impact and high velocity were optimized. For Charpy impact, the maximal impact load increased with the accretion of the AF layers for AF/DF hybrid composites. The total impact power was reduced with the decrease of DF layers and the delamination can result in the increase of total impact power. For ballistic impact, the DF ballistic performance was better than that of the AF and the hybrid ratio had a crucial influence. The failure morphology of AF/DF hybrid composite under Charpy impact and ballistic impact was analyzed. The AF/DF hybrid composites in suitable hybrid ratio could attain better performance than AF or DF composites.
关键词:
Aramid fiber
,
null
,
null
,
null
陈蓉
,
宋博
,
伏玲
,
寇朝辉
宇航材料工艺
doi:10.3969/j.issn.1007-2330.2014.03.008
通过添加含卤-锑的阻燃剂、芳纶纤维和增塑剂,研制了一种耐低温无石棉的丁腈绝热层配方(TI506).研究了芳纶纤维和增塑剂对绝热层静态烧蚀性能和Tg的影响,对绝热层材料力学性能、比热容、热导率等性能进行了测试.结果表明:芳纶纤维浆粕用量为10～15份、芳纶短纤维用量为4～6份时,绝热层烧蚀性能最佳,线烧蚀率达到45 μm/s,所选增塑剂DOS用量为10份、DBP或ATBC用量为20份时,Tg可达-40℃,芳纶纤维制备的丁腈绝热层力学性能及烧蚀性能优良,并满足固体火箭发动机耐-40～60℃的环境.
关键词:
芳纶纤维
,
玻璃化转变温度
,
绝热层
,
烧蚀性能
刘新东
,
孔海娟
,
杨鹏
,
滕翠青
,
余木火
,
袁象恺
材料科学与工程学报
本文用超临界二氧化碳流体做反应介质,利用其超强的扩散性及溶解渗透性,将甲苯-2,4-二异氰酸酯(TDI)带到芳纶纤维表面进行渗透并发生接枝、扩链反应,通过红外光谱、扫描电镜、X-射线光电子能谱方法、AFM等测试了纤维的表面形貌变化及元素、基团变化,并用VARI成型技术制成复合材料,测试了改性芳纶布与环氧基体的力学性能和界面性能.结果表明:经改性的纤维表面变得粗糙,极性基团增加,复合材料界面剪切强力明显增加,改性复合材料力学性能及界面得到改善,纤维更适合用作复合增强材料.
关键词:
超临界二氧化碳
,
芳纶纤维
,
表面改性
,
甲苯-2,4-二异氰酸酯
